Information on the difference between source and site energy is provided on this website, and our Source Energy Technical Reference document which is a complete technical document that provides detail on the distinction between site and source energy and the value of performing source energy comparisons. This document provides details on the policies for incorporating renewable energy, the philosophy behind the use of national factors, and the specific calculations used to derive each conversion factor.
The simple choice for energy efficiency.
energy efficient products
ENERGY STAR products are independently certified to save energy without sacrificing features or functionality. Saving energy helps prevent climate change. Look for the ENERGY STAR label to save money on your energy bills and help protect our environment.
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ENERGY SAVINGSat home
energy savings at home
Improving your home's energy efficiency with ENERGY STAR can help to lower high energy bills, improve comfort and reduce greenhouse gas emissions. Learn about the many ways to save in your home and track your progress with "My ENERGY STAR" - your new dashboard to savings.
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ENERGY EFFICIENTnew homes
energy efficient new homes
A new home that has earned the ENERGY STAR label has undergone a process of inspections, testing, and verification to meet strict requirements set by the US EPA. ENERGY STAR certified homes use 15-30% less energy than typical new homes while delivering better comfort, quality, and durability.
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ENERGY STRATEGIES FORbuildings & plants